Abstract
We demonstrate optimization of continuous wave (cw) operation of 4.6 μm quantum cascade lasers (QCLs). A 19.7 μm by 5 mm, double channel processed device exhibits 33% cw WPE at 80 K. Room temperature cw WPE as high as 12.5% is obtained from a 10.6 μm by 4.8 mm device, epilayer-down bonded on a diamond submount. With the semi-insulating regrowth in a buried ridge geometry, 15% WPE is obtained with 2.8 W total output power in cw mode at room temperature. This accomplishment is achieved by systematically decreasing the parasitic voltage drop, reducing the waveguide loss and improving the thermal management.
Original language | English (US) |
---|---|
Article number | 72220O |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 7222 |
DOIs | |
State | Published - Mar 23 2009 |
Event | Quantum Sensing and Nanophotonic Devices VI - San Jose, CA, United States Duration: Jan 25 2009 → Jan 28 2009 |
Keywords
- Mid infrared
- Quantum cascade lasers
- Wall plug efficiency
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics